Abstract
An Nd3+-doped fluorogallate glass with better thermal stability (Tg=650.5°C, ΔT=190°C), and lower linear thermal expansion coefficient (8.7×10−6/°C) compared with other commercialized laser glasses is reported in this paper. Judd–Ofelt theory is applied to the absorption spectrum of the glass to derive the intensity parameters (Ωt), which are in turn used to calculate the radiative properties of Nd3+ luminescent levels. The developed glass possesses the widest effective emission bandwidth (Δλeff=49nm) ever reported at around 1.07μm, large gain bandwidth parameter (σem×Δλeff=102.9×10−27cm3), and high fluorescence quantum efficiency (η=66%). These results indicate that this new kind of material is an interesting candidate for laser applications.
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